| 摘要 |
PURPOSE:To let only light with desired wavelength pass to the outside, and to prevent return of returning light into a resonator of the laser generation device, by sealing a laser generation device in a case to the open air with a blocking member, and by mounting obliquely an optical element having optical wavelength selectivity on a window provided on the blocking member. CONSTITUTION:A laser generation part and a mirror which constitute a laser generation device are housed in the open space inside of a case body 11. A cover 12 serves as an interrupter between inside of the case and the open air. The cover 12 is provided with a window which makes pass the output light coming from the laser generation device to the outside. The surface of the window 13 serves as a reflection preventing film against the desired light by using glass, quartz and/or crystal, and it serves as an interference filter against other light, thereby an optical element having optional wavelength is formed. The window 13 is mounted on the cover 12 by using a supporter 14 in such a way that the angle is inclined by 0 to the optical axis of output light from the laser generation device. |
